International contact lens prescribing in 2006

Our annual update on contact lens prescribing trends reports on more than 22,000 prospectively conducted fits in 19 countries.

International contact lens prescribing

Survey results from six countries provide a snapshot of contact lens prescribing around the world.

International contact lens prescribing in 2005

This article presents our fifth annual survey of international contact lens prescribing trends. In the first half of 2005, we analyzed prescribing habits in 15 countries: Australia, Belgium, Canada, the Czech Republic, Germany, Greece, Japan, the Netherlands, New Zealand, Norway, Singapore, Russia, Sweden, the United Kingdom and the United States. In each country, we sent 1,000 surveys (or fewer in countries where this exceeded the total number of practitioners) to contact lens clinicians who were randomly selected from appropriate national registers.

International contact lens prescribing in 2004

This article presents our fourth annual survey of international contact lens prescribing trends. In 2004, we analyzed prescribing habits in 14 countries: Australia, Belgium, Canada, Germany, Greece, Italy, Japan, the Netherlands, New Zealand, Norway, Singapore, Sweden, the United Kingdom and the United States. To each, we sent 1,000 surveys (or a pro-rata number in countries with less than 1,000 practitioners) to clinicians randomly selected from appropriate national registers.

The surveys elicited prospective information about contact lenses and care products that respondents prescribed to up to 10 patients fit after the study began. We employed a weighting system to better reflect the trends of busier practices.

International contact lens prescribing in 2003

This is our third annual survey of international contact lens prescribing trends. Between January and March 2003, we analyzed prescribing habits in 10 countries: Australia, Belgium, Canada, Greece, Japan, the Netherlands, Norway, Singapore, the United Kingdom and the United States. In the larger countries, we randomly sent 1,000 surveys to contact lens practitioners selected from national registers of qualified clinicians (in the United States, we used the subscriber list of Contact Lens Spectrum). In Norway and Singapore, where the number of practitioners is less than 1,000, we mailed out a pro rata quantity of surveys.

International contact lens prescribing 2002

This paper presents our second annual survey of international contact lens prescribing trends. From January to March 2002, we analyzed contact lens prescribing habits in eight countries: Australia, Canada, Greece, the Netherlands, Norway, Singapore, the United Kingdom and the United States. With the exception of Norway and Singapore (545 and 390 surveys, respectively), 1,000 questionnaires were randomly sent out to a cross section of contact lens practitioners.

Improving fiber trapping with a contact surface during the ring twisting of two cotton yarns

In this study, a geometrical model was introduced to improve the hair trapping via a surface contacting the yarn-twisting triangle during ring twisting of two single yarns. The fiber-trapping improvement with the contact surface was analyzed theoretically. Then, single Ne 80 ring cotton yarns were used to produce two-ply yarns under different ring-twisting conditions, namely conventional twisting, dry twisting of yarns with a plane surface, wet twisting of yarns with a plane surface, dry twisting of yarns with a grooved surface, and wet twisting of yarns with a grooved surface. Plied yarn properties, including yarn hairiness, strength, and irregularity, were tested. The Student Newman Keuls (SNK) test and variation analysis were also carried out in the SPSS program to study the effect of different contact surfaces on related yarn properties; the significance level was 0.05 for the SNK test and variation analysis. The hairiness of plied yarns was significantly reduced when twisting with the plane or grooved surface, especially for the wet twisting cases. This corresponds well with our model on improving fiber trapping.